A handy way of keeping track of discussion board activity is to subscribe to the discussion, this means that you will get an email everytime someone posts to the discussion. To subscribe to a discussion follow the below steps:
1. Go to the discussions page of your site (If it is a Group Discussion you wish to subscribe to then go to the Group Discussion).
2. Click the name of the discussion board you want to subscribe to
3. Once you are in the discussion board you will see a Subscribe button in the top left hand corner. Click on the Subscribe button.